[djoole]

Found a solution to my problem.

Kodi is configured to switch display refresh mode to match that of the video's. My display's refresh rate is 23.970. My video is 23.976. There is a small difference of .006.

I installed reclock, and viola! Everything is running smoothly. No drop frames. OSD doesn't cause video stutters.

Nice to know you solved your issue, but it's not the same than mine.

I have a pretty good 23.976Hz (although not perfect) thanks to a custom res in my Nvidia panel.
And I have no madVR frame issues in madVR stats.
Only video stuttering during OSD.

I don't think it's related to performance issues, otherwise I would see dropped frames in madVR stats.

May be we are facing two different issues then. What I have reported happens on both Windows 7 and Windows 10, with AMD or Intel graphic solutions. Well, I think I will go for the external player solution for the time being...is a pity that the development of DSPlayer has been stopped.

Yes maybe. A pity to stop using DSPlayer if the only problem you have is stuttering during OSD..